In a bid to answer this essential life question, Norwegian brothers Bård and Vegard Ylvisåker dressed in animal suits and created one of the most epic *crap* music videos of all time - they've even made appearances on Ellen DeGeneres and Jimmy Fallon.
In honour of the 'ding ding ding de ding ding', we've put together a little round-up of our favourite viral music videos...Enjoy!
Ylvis - The Fox (What does the Fox say?)
Psy - Gangnam StylePark Jae-sang, better known by his stage name Psy, is basically South Korea's version of Justin Timberlake. His video for Gangnam Style has created a viral dance sensation that refuses to go away.
Rebecca Black - FridayThis squeaky, auto-tuned mess of a song caused so much online vitriol, Katy Perry invited the poor girl to appear in her Last Friday Night music video.
Asian Backstreet Boys - I Want It That WayLip-syncing to a 90s pop band doesn't get much more dramatic from this...
Rufus Starlight and Baddy Paris - We Are BrothersWhen asked to do a best man's speech for their brother's wedding, these pranksters went full-on WHAM! stylee.
Rachael Hurwitz - Alanis Morissette's IronicFinally, the song that's not ironic has been made ironic. Or was the fact that a song called ironic wasn't ironic at all ironic? God we're confused!
What's your favourite viral video?
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